%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2005-2013. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%
%%
%%% Description: Example ssh server
-module(ssh_echo_server).
-behaviour(ssh_daemon_channel).
-record(state, {
n,
id,
cm
}).
-export([init/1, handle_msg/2, handle_ssh_msg/2, terminate/2]).
init([N]) ->
{ok, #state{n = N}}.
handle_msg({ssh_channel_up, ChannelId, ConnectionManager}, State) ->
{ok, State#state{id = ChannelId,
cm = ConnectionManager}}.
handle_ssh_msg({ssh_cm, CM, {data, ChannelId, 0, Data}}, #state{n = N} = State) ->
M = N - size(Data),
case M > 0 of
true ->
ssh_connection:send(CM, ChannelId, Data),
{ok, State#state{n = M}};
false ->
<<SendData:N/binary, _/binary>> = Data,
ssh_connection:send(CM, ChannelId, SendData),
ssh_connection:send_eof(CM, ChannelId),
{stop, ChannelId, State}
end;
handle_ssh_msg({ssh_cm, _ConnectionManager,
{data, _ChannelId, 1, Data}}, State) ->
error_logger:format(standard_error, " ~p~n", [binary_to_list(Data)]),
{ok, State};
handle_ssh_msg({ssh_cm, _ConnectionManager, {eof, _ChannelId}}, State) ->
{ok, State};
handle_ssh_msg({ssh_cm, _, {signal, _, _}}, State) ->
%% Ignore signals according to RFC 4254 section 6.9.
{ok, State};
handle_ssh_msg({ssh_cm, _, {exit_signal, ChannelId, _, _Error, _}},
State) ->
{stop, ChannelId, State};
handle_ssh_msg({ssh_cm, _, {exit_status, ChannelId, _Status}}, State) ->
{stop, ChannelId, State}.
terminate(_Reason, _State) ->
ok.
